/**
* Compile the jsp file from the current engine context. As an side- effect, tag files that are
* referenced by this page are also compiled.
*
* @param compileClass If true, generate both .java and .class file If false, generate only .java
* file
* @param jspcMode true if invoked from JspC, false otherwise
*/
public void compile(boolean compileClass, boolean jspcMode)
throws FileNotFoundException, JasperException, Exception {
if (errDispatcher == null) {
this.errDispatcher = new ErrorDispatcher(jspcMode);
}
try {
String[] smap = generateJava();
if (compileClass) {
generateClass(smap);
// Fix for bugzilla 41606
// Set JspServletWrapper.servletClassLastModifiedTime after successful compile
String targetFileName = ctxt.getClassFileName();
if (targetFileName != null) {
File targetFile = new File(targetFileName);
if (targetFile.exists() && jsw != null) {
jsw.setServletClassLastModifiedTime(targetFile.lastModified());
}
}
}
} finally {
if (tfp != null && ctxt.isPrototypeMode()) {
tfp.removeProtoTypeFiles(null);
}
// Make sure these object which are only used during the
// generation and compilation of the JSP page get
// dereferenced so that they can be GC'd and reduce the
// memory footprint.
tfp = null;
errDispatcher = null;
pageInfo = null;
// Only get rid of the pageNodes if in production.
// In development mode, they are used for detailed
// error messages.
// http://issues.apache.org/bugzilla/show_bug.cgi?id=37062
if (!this.options.getDevelopment()) {
pageNodes = null;
}
if (ctxt.getWriter() != null) {
ctxt.getWriter().close();
ctxt.setWriter(null);
}
}
}
private ServletWriter setupContextWriter(String javaFileName)
throws FileNotFoundException, JasperException {
ServletWriter writer;
// Setup the ServletWriter
String javaEncoding = ctxt.getOptions().getJavaEncoding();
OutputStreamWriter osw = null;
try {
osw = new OutputStreamWriter(new FileOutputStream(javaFileName), javaEncoding);
} catch (UnsupportedEncodingException ex) {
errDispatcher.jspError("jsp.error.needAlternateJavaEncoding", javaEncoding);
}
writer = new ServletWriter(new PrintWriter(osw));
ctxt.setWriter(writer);
return writer;
}
/**
* Compile the jsp file from the current engine context. As an side- effect, tag files that are
* referenced by this page are also compiled.
*
* @param compileClass If true, generate both .java and .class file If false, generate only .java
* file
*/
public void compile(boolean compileClass)
throws FileNotFoundException, JasperException, Exception {
try {
// Create the output directory for the generated files
// Always try and create the directory tree, in case the generated
// directories were deleted after the server was started.
ctxt.makeOutputDir(ctxt.getOutputDir());
// If errDispatcher is nulled from a previous compilation of the
// same page, instantiate one here.
if (errDispatcher == null) {
errDispatcher = new ErrorDispatcher(jspcMode);
}
generateJava();
if (compileClass) {
generateClass();
} else {
// If called from jspc to only compile to .java files,
// make sure that .java files are written to disk.
javaCompiler.doJavaFile(ctxt.keepGenerated());
}
} finally {
if (tfp != null) {
tfp.removeProtoTypeFiles(null);
}
// Make sure these object which are only used during the
// generation and compilation of the JSP page get
// dereferenced so that they can be GC'd and reduce the
// memory footprint.
tfp = null;
errDispatcher = null;
if (!jspcMode) {
pageInfo = null;
}
pageNodes = null;
if (ctxt.getWriter() != null) {
ctxt.getWriter().close();
ctxt.setWriter(null);
}
}
}
/** Compile the jsp file into equivalent servlet in java source */
private void generateJava() throws Exception {
long t1, t2, t3, t4;
t1 = t2 = t3 = t4 = 0;
if (log.isLoggable(Level.FINE)) {
t1 = System.currentTimeMillis();
}
// Setup page info area
pageInfo =
new PageInfo(new BeanRepository(ctxt.getClassLoader(), errDispatcher), ctxt.getJspFile());
JspConfig jspConfig = options.getJspConfig();
JspProperty jspProperty = jspConfig.findJspProperty(ctxt.getJspFile());
/*
* If the current uri is matched by a pattern specified in
* a jsp-property-group in web.xml, initialize pageInfo with
* those properties.
*/
pageInfo.setELIgnored(JspUtil.booleanValue(jspProperty.isELIgnored()));
pageInfo.setScriptingInvalid(JspUtil.booleanValue(jspProperty.isScriptingInvalid()));
pageInfo.setTrimDirectiveWhitespaces(JspUtil.booleanValue(jspProperty.getTrimSpaces()));
pageInfo.setDeferredSyntaxAllowedAsLiteral(JspUtil.booleanValue(jspProperty.getPoundAllowed()));
pageInfo.setErrorOnUndeclaredNamespace(
JspUtil.booleanValue(jspProperty.errorOnUndeclaredNamespace()));
if (jspProperty.getIncludePrelude() != null) {
pageInfo.setIncludePrelude(jspProperty.getIncludePrelude());
}
if (jspProperty.getIncludeCoda() != null) {
pageInfo.setIncludeCoda(jspProperty.getIncludeCoda());
}
if (options.isDefaultBufferNone() && pageInfo.getBufferValue() == null) {
// Set to unbuffered if not specified explicitly
pageInfo.setBuffer(0);
}
String javaFileName = ctxt.getServletJavaFileName();
ServletWriter writer = null;
try {
// Setup the ServletWriter
Writer javaWriter =
javaCompiler.getJavaWriter(javaFileName, ctxt.getOptions().getJavaEncoding());
writer = new ServletWriter(new PrintWriter(javaWriter));
ctxt.setWriter(writer);
// Reset the temporary variable counter for the generator.
JspUtil.resetTemporaryVariableName();
// Parse the file
ParserController parserCtl = new ParserController(ctxt, this);
pageNodes = parserCtl.parse(ctxt.getJspFile());
if (ctxt.isPrototypeMode()) {
// generate prototype .java file for the tag file
Generator.generate(writer, this, pageNodes);
writer.close();
writer = null;
return;
}
// Validate and process attributes
Validator.validate(this, pageNodes);
if (log.isLoggable(Level.FINE)) {
t2 = System.currentTimeMillis();
}
// Collect page info
Collector.collect(this, pageNodes);
// Compile (if necessary) and load the tag files referenced in
// this compilation unit.
tfp = new TagFileProcessor();
tfp.loadTagFiles(this, pageNodes);
if (log.isLoggable(Level.FINE)) {
t3 = System.currentTimeMillis();
}
// Determine which custom tag needs to declare which scripting vars
ScriptingVariabler.set(pageNodes, errDispatcher);
// Optimizations by Tag Plugins
TagPluginManager tagPluginManager = options.getTagPluginManager();
tagPluginManager.apply(pageNodes, errDispatcher, pageInfo);
// Optimization: concatenate contiguous template texts.
TextOptimizer.concatenate(this, pageNodes);
// Generate static function mapper codes.
ELFunctionMapper.map(this, pageNodes);
// generate servlet .java file
Generator.generate(writer, this, pageNodes);
writer.close();
writer = null;
// The writer is only used during the compile, dereference
// it in the JspCompilationContext when done to allow it
// to be GC'd and save memory.
ctxt.setWriter(null);
if (log.isLoggable(Level.FINE)) {
t4 = System.currentTimeMillis();
log.fine(
"Generated "
+ javaFileName
+ " total="
+ (t4 - t1)
+ " generate="
+ (t4 - t3)
+ " validate="
+ (t2 - t1));
}
} catch (Exception e) {
if (writer != null) {
try {
writer.close();
writer = null;
} catch (Exception e1) {
// do nothing
}
}
// Remove the generated .java file
javaCompiler.doJavaFile(false);
throw e;
} finally {
if (writer != null) {
try {
writer.close();
} catch (Exception e2) {
// do nothing
}
}
}
// JSR45 Support
if (!options.isSmapSuppressed()) {
smapUtil.generateSmap(pageNodes);
}
// If any proto type .java and .class files was generated,
// the prototype .java may have been replaced by the current
// compilation (if the tag file is self referencing), but the
// .class file need to be removed, to make sure that javac would
// generate .class again from the new .java file just generated.
tfp.removeProtoTypeFiles(ctxt.getClassFileName());
}
/**
* Compile the jsp file into equivalent servlet in .java file
*
* @return a smap for the current JSP page, if one is generated, null otherwise
*/
protected String[] generateJava() throws Exception {
String[] smapStr = null;
long t1, t2, t3, t4;
t1 = t2 = t3 = t4 = 0;
if (log.isDebugEnabled()) {
t1 = System.currentTimeMillis();
}
// Setup page info area
pageInfo =
new PageInfo(new BeanRepository(ctxt.getClassLoader(), errDispatcher), ctxt.getJspFile());
JspConfig jspConfig = options.getJspConfig();
JspConfig.JspProperty jspProperty = jspConfig.findJspProperty(ctxt.getJspFile());
/*
* If the current uri is matched by a pattern specified in a
* jsp-property-group in web.xml, initialize pageInfo with those
* properties.
*/
if (jspProperty.isELIgnored() != null) {
pageInfo.setELIgnored(JspUtil.booleanValue(jspProperty.isELIgnored()));
}
if (jspProperty.isScriptingInvalid() != null) {
pageInfo.setScriptingInvalid(JspUtil.booleanValue(jspProperty.isScriptingInvalid()));
}
if (jspProperty.getIncludePrelude() != null) {
pageInfo.setIncludePrelude(jspProperty.getIncludePrelude());
}
if (jspProperty.getIncludeCoda() != null) {
pageInfo.setIncludeCoda(jspProperty.getIncludeCoda());
}
if (jspProperty.isDeferedSyntaxAllowedAsLiteral() != null) {
pageInfo.setDeferredSyntaxAllowedAsLiteral(
JspUtil.booleanValue(jspProperty.isDeferedSyntaxAllowedAsLiteral()));
}
if (jspProperty.isTrimDirectiveWhitespaces() != null) {
pageInfo.setTrimDirectiveWhitespaces(
JspUtil.booleanValue(jspProperty.isTrimDirectiveWhitespaces()));
}
// Default ContentType processing is deferred until after the page has
// been parsed
if (jspProperty.getBuffer() != null) {
pageInfo.setBufferValue(jspProperty.getBuffer(), null, errDispatcher);
}
if (jspProperty.isErrorOnUndeclaredNamespace() != null) {
pageInfo.setErrorOnUndeclaredNamespace(
JspUtil.booleanValue(jspProperty.isErrorOnUndeclaredNamespace()));
}
if (ctxt.isTagFile()) {
try {
double libraryVersion =
Double.parseDouble(ctxt.getTagInfo().getTagLibrary().getRequiredVersion());
if (libraryVersion < 2.0) {
pageInfo.setIsELIgnored("true", null, errDispatcher, true);
}
if (libraryVersion < 2.1) {
pageInfo.setDeferredSyntaxAllowedAsLiteral("true", null, errDispatcher, true);
}
} catch (NumberFormatException ex) {
errDispatcher.jspError(ex);
}
}
ctxt.checkOutputDir();
String javaFileName = ctxt.getServletJavaFileName();
ServletWriter writer = null;
try {
/*
* The setting of isELIgnored changes the behaviour of the parser
* in subtle ways. To add to the 'fun', isELIgnored can be set in
* any file that forms part of the translation unit so setting it
* in a file included towards the end of the translation unit can
* change how the parser should have behaved when parsing content
* up to the point where isELIgnored was set. Arghh!
* Previous attempts to hack around this have only provided partial
* solutions. We now use two passes to parse the translation unit.
* The first just parses the directives and the second parses the
* whole translation unit once we know how isELIgnored has been set.
* TODO There are some possible optimisations of this process.
*/
// Parse the file
ParserController parserCtl = new ParserController(ctxt, this);
// Pass 1 - the directives
Node.Nodes directives = parserCtl.parseDirectives(ctxt.getJspFile());
Validator.validateDirectives(this, directives);
// Pass 2 - the whole translation unit
pageNodes = parserCtl.parse(ctxt.getJspFile());
// Leave this until now since it can only be set once - bug 49726
if (pageInfo.getContentType() == null && jspProperty.getDefaultContentType() != null) {
pageInfo.setContentType(jspProperty.getDefaultContentType());
}
if (ctxt.isPrototypeMode()) {
// generate prototype .java file for the tag file
writer = setupContextWriter(javaFileName);
Generator.generate(writer, this, pageNodes);
writer.close();
writer = null;
return null;
}
// Validate and process attributes - don't re-validate the
// directives we validated in pass 1
Validator.validateExDirectives(this, pageNodes);
if (log.isDebugEnabled()) {
t2 = System.currentTimeMillis();
}
// Collect page info
Collector.collect(this, pageNodes);
// Compile (if necessary) and load the tag files referenced in
// this compilation unit.
tfp = new TagFileProcessor();
tfp.loadTagFiles(this, pageNodes);
if (log.isDebugEnabled()) {
t3 = System.currentTimeMillis();
}
// Determine which custom tag needs to declare which scripting vars
ScriptingVariabler.set(pageNodes, errDispatcher);
// Optimizations by Tag Plugins
TagPluginManager tagPluginManager = options.getTagPluginManager();
tagPluginManager.apply(pageNodes, errDispatcher, pageInfo);
// Optimization: concatenate contiguous template texts.
TextOptimizer.concatenate(this, pageNodes);
// Generate static function mapper codes.
ELFunctionMapper.map(pageNodes);
// generate servlet .java file
writer = setupContextWriter(javaFileName);
Generator.generate(writer, this, pageNodes);
writer.close();
writer = null;
// The writer is only used during the compile, dereference
// it in the JspCompilationContext when done to allow it
// to be GC'd and save memory.
ctxt.setWriter(null);
if (log.isDebugEnabled()) {
t4 = System.currentTimeMillis();
log.debug(
"Generated "
+ javaFileName
+ " total="
+ (t4 - t1)
+ " generate="
+ (t4 - t3)
+ " validate="
+ (t2 - t1));
}
} catch (Exception e) {
if (writer != null) {
try {
writer.close();
writer = null;
} catch (Exception e1) {
// do nothing
}
}
// Remove the generated .java file
File file = new File(javaFileName);
if (file.exists()) {
if (!file.delete()) {
log.warn(
Localizer.getMessage(
"jsp.warning.compiler.javafile.delete.fail", file.getAbsolutePath()));
}
}
throw e;
} finally {
if (writer != null) {
try {
writer.close();
} catch (Exception e2) {
// do nothing
}
}
}
// JSR45 Support
if (!options.isSmapSuppressed()) {
smapStr = SmapUtil.generateSmap(ctxt, pageNodes);
}
// If any proto type .java and .class files was generated,
// the prototype .java may have been replaced by the current
// compilation (if the tag file is self referencing), but the
// .class file need to be removed, to make sure that javac would
// generate .class again from the new .java file just generated.
tfp.removeProtoTypeFiles(ctxt.getClassFileName());
return smapStr;
}
